----- Original Message ----- From: "smf" <smf@null.net> To: <cbm-hackers@musoftware.de> Sent: Saturday, September 08, 2018 5:13 AM Subject: Re: Plus/4 RS232 woes > ...the datasheet documents that the baud rate generator supports 15 rates. > > It doesn't give any indication how the 0,0,0,0 case is handled inside. > ======== Do you have the same difficulty imagining how the receive clock might be generated/selected with bit 4 of the control register? "This bit controls the clock source to the Receiver. A 0 causes the Receiver to operate at 1/16 an external clock" while "A 1 causes the Receiver to operate at the same baud rate as the transmitter". Sounds about the same as "bits 0,1,2,3 select the transmitter baud rate, which can be ['0000',] at 1/16 an external clock rate or ['xxxx > 0',] one of 15 other baud rates controlled by the internal baud rate generator." Seems clear to me; what am I missing? mReceived on 2018-09-11 03:00:07
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